diff --git a/apps/shell/shell-ps.c b/apps/shell/shell-ps.c
index c1d6643db..673369515 100644
--- a/apps/shell/shell-ps.c
+++ b/apps/shell/shell-ps.c
@@ -58,7 +58,9 @@ PROCESS_THREAD(shell_ps_process, ev, data)
 
   shell_output_str(&ps_command, "Processes:", "");
   for(p = PROCESS_LIST(); p != NULL; p = p->next) {
-    shell_output_str(&ps_command, PROCESS_NAME_STRING(p), "");
+    char namebuf[30];
+    strncpy(namebuf, PROCESS_NAME_STRING(p), sizeof(namebuf));
+    shell_output_str(&ps_command, namebuf, "");
   }
 
   PROCESS_END();